@Pavel Yannara Mirochnitchenko, Thanks for posting in Q&A. From your description, it seems new machines is working after fixing conflicts. but old machines still show error.
To troubleshoot our issue, please collect the following information:
- What is the specific affected setting? How many settings are affected?
- For the old machines, if we try to sync the devices and restart the device, will the result be different?
- After we sync policy on device, is there still any related error under event log Applications and Services Logs > Microsoft > Windows > DeviceManagement-Enterprise-Diagnostic-Provider? existing?
Please confirm the above information and if there's any update, feel free to let us know.
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